RF Power Detector With Orientation Sensing for WPT Beam Mapping
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Solution Overview
Problem
Conventional wireless power transfer systems require bulky and expensive measurement equipment to verify power levels and beam profiles, necessitating specialized expertise and being inaccessible to end users for efficient and safe operation.
Innovation Solution
An RF power detector with an antenna, narrow-band RF power converter, accelerometer, magnetometer, and gyroscope to convert RF signals to DC, providing information on power, orientation, and position, allowing for efficient and user-friendly power mapping and verification without the need for expensive equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If specialty precision RF and microwave measurement equipment is used to verify power levels and beam profiles, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent uses a simplified power detector that copies the essential function of complex RF measurement equipment. Instead of using horn antennas, microwave cables, spectrum analyzers, and power meters, the invention creates a compact detector with an antenna, rectifier, and basic electronics that replicates the core measurement capability at a fraction of the complexity and cost.
Solution Approach 2:
The invention replaces expensive, specialized measurement equipment with inexpensive, simple components. The power detector uses basic elements like a small antenna, rectifier diode, and indicator that can be manufactured cheaply and disposed of or replaced easily, eliminating the need for costly precision instruments.
2Measurement precision
If specialty precision RF and microwave measurement equipment is used, then measurement precision is improved, but ease of operation deteriorates due to requiring specialized expertise
Solution Approach 1:
The power detector is designed to be self-explanatory and easy to use. The device includes visual indicators (such as LED bars or display elements) that automatically show power levels without requiring the user to interpret complex measurements or understand RF theory. The detector essentially performs the measurement and presents the result in an intuitively understandable format.
Solution Approach 2:
The invention copies the user interface of simple consumer electronics rather than professional measurement equipment. The power detector presents information in a format similar to mobile devices or consumer electronics, making it accessible to end users without specialized training.
3Measurement precision
If conventional measurement equipment is used, then measurement precision is improved, but portability and compactness deteriorate due to bulky equipment requirements
Solution Approach 1:
The patent combines multiple separate measurement components into a single integrated unit. Instead of requiring separate horn antennas, cables, spectrum analyzers, and power meters, the invention merges all necessary functions into one compact handheld device that fits in the palm of a hand or small pocket.
Solution Approach 2:
The invention transitions from the large-scale dimensional requirements of conventional RF measurement equipment to a miniaturized form factor. By using modern miniaturized antenna designs, surface-mount electronics, and integrated circuits, the device achieves accurate measurement capability in a dimensionally compact package.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables quick and effortless verification of wireless power delivery, optimizing beam-forming and focusing, and ensuring regulatory compliance, while being compact, cost-effective, and operable by non-specialized users.
Implementation Method 1
an antenna adapted to receive an RF signal
Implementation Method 2
a narrow-band RF power converter adapted to convert the RF signal to a DC signal
Implementation Method 3
an accelerometer and a magnetometer adapted to determine an orientation and a location of the power detector
Implementation Method 4
an accelerometer and a magnetometer adapted to determine an orientation and a location of the power detector
Data Source
AI summary
An RF power detector adapted to detect an RF power of an RF signal, includes, in part, an antenna adapted to receive the RF signal, a narrow-band RF power converter adapted to convert the RF signal to a DC signal, an accelerometer, and a magnetometer. The accelerometer and magnetometer are adapted to determine the orientation and location of the power detector. The power detector optionally includes a gyroscope. The narrow-band RF power converter may be a rectifier tuned to the frequency of the RF signal. The power detector optionally includes an indicator adapted to provide information representative of the amount of the DC power of the DC signal, as well as position and orientation of the power detector. The power detector may be adapted to be inserted into a mobile device so as to provide the information about the amount of DC power, orientation and position to the mobile device.